Had 2 periods so far, 1 in September and one in October… November I’m a few days late…

Was pumping 3 times a day up until a few months ago dropped to 2 now 1. My period came back September (gave birth March) so I had my period September and October. Now I am late this month…. Could my body just be acting weird or am I most likely pregnant? My husband and I have been doing pullout method and that’s it as we would be happy with a surprise if we get pregnant but aren’t actively trying at the moment. When should I try a pregnancy test? How many missed days? Or could it just be two prior months in a row promptly got my period and now my body is acting up getting back to normal? Thoughts? Thanks